Bit-hoist.



B. E. PARRISH & S. STAGE.

BIT HOIST.

APPLICATION FILED JUNE 22. I918.

m mm Patented Feb.11,1919.

2 SHEETSSHEET I.

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BIT HOIST.

APPLICATION FILED JUNE 22. ms.

LQM, 1 53., Patented Feb. 11, 1919.

2 SHEETS-SHEET 2.

Wiinesses 776/2" lmmmw -M Mmw D 50202-22021 SM BENJAMIN EUGENE PABRISH AND SOLOMON STAGE, OF MINERAL WELLS, TEXAS.

BIT-HOIST.

Specification of Letters Patent.

Patented Feb. 11, 1919.

7 '0 all whom it may concern:

Be it known that we, BENJAMIN E. PAR- RISH and SOLOMON STAGE, citizens of the United States, residing at Mineral Wells, 1n the county of Palo Pinto and State of Texas, have invented new and useful Improvements in Bit-Hoists, ofwhich the following 1s a specification.

This invention relates to new and useful improvements in bit or drill hoists and the principal object of the invention is to provide means for handling bits or drills of well boring machines and the like.

By our invention the bit or drlll maybe easily removed from the drilllng mach ne and transported to the forge and easlly handled in the operations of dressing the bit, or the machine may be used for placing the drills in their racks or in raislng the drills off the fioor or ground.

Another object of the invention is to provide a device of this character which 1s simple and durable in. construction, rellable and eiiicient in operation and one which can be manufactured and placed upon themarket at a minimum cost.

The invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawmgs and specifically pointed out in the appended claims. 4

In describing our invention in detail, reference will be had to the accompanymg drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a front view of the machine.

Fig. 2 is a longitudinal section.

Fig. 3 is a top view.

Fig. 4 is a transverse section through the swiveled ring.

Fig. 5 is a section on line 55 of Flg. 4.

Fig. 6 is a detail view.

In these views 1 indicates the platform mounted on the wheels 2, some of which may be caster wheels to permit the platform to be easily steered. The platform is provided with a centrally located opening 3 which receives the stub shaft 4 carried by across head 5. If desired, suitable anti-friction bearings may be located between the platform and the part carrying the shaft to act as a thrust bearing. In this manner the cross head may be revolved above the platform. At each end of the cross head is mounted an upright 6 of tubular shape and provided with a longitudinal slot 7 which communicates with the bore of said upright.

A screw shaft 8 is mounted in each upright with its lower end projecting through the end of the upright and said lower end is provided with a beveled gear 9 which meshes with like gears 10 secured to the ends of a shaft 11 passin through the cross head. 12 is a traveling block engaging each of the uprights and provided with a part extending within the slot 7 and engaging the screw threaded shaft. In this way when the shafts are revolved the blocks-will be moved vertically along the uprights. A ring 13 is swiveled to said blocks at diametrically opposite points by means of bolts or pins and a carrying member 14 has a circumferential groove 15 in which said ring fits. Said carrying member is provided with a central opening 16 which passes through one edge of said member and the ring is provided with a slot 17 of substantially the same width as said opening. The upper face of the carrying member is provided with lugs 18 having screw threaded openings therein through which pass large set screws 19 having supporting heads 20 swiveled to their inner ends. The screw shafts are operated by means of a crank 21 carried by a shaft 2-2 supported in a bracket 23 connected with one of the uprights and said shaft is geared to a second shaft 24 which is suitably connected with one of the gears 9. so that when the crank 21 is rotated both of the screw shafts 8 will be revolved to move the ring and the carrying member vertically on the upright.

The operation ofthe machine is as follows The carriage or platform is moved close to the tool hanging in the derrick or drilling machine and the carrying member is turned until its opening coincides with the slot in the ring so that the tool may pass into said opening. The set screws are turned until the swiveled heads thereon will enter the Water grooves A formed in the tool. The set screws are then turned to clamp the tool between said heads. The carrying member is then revolved on the ring to unscrew the tool from the machine. The ring is then lowered by'turning the crank until the ring with the tool in the carrying member in near the lower ends of the uprights, it being understood that the tool is rocked until it assumes a horizontal position when the ring is at the lower part of its movement, the ring turning on its ivots to permit the tool to assume its horlzontal posltion. The latform or carriage is then rolled to the orge and the device ma be manipulated to place the end of the too inthe forge. If desired a shield may be laced on the machine to protect the parts rom the heat of the forge.

I After the tool has become sufficiently heated the carriage or platform is moved over to the anvil to ermit the end of the tool to be dressed. ghe swiveled rin and carr ing member will permit sai tool to e turned in all directions to permit the proper dressing of the point. 'After this is done the tool may be reheated and then lifted to a vertical position to permit the point be- .ing placed in the tub of water. After this is done the tool may be returned to the drilling machine and replaced therein or it may be taken to the rack. The device may be fall within the scope of the appended claims.

What we claim 1s: 1. A hoist of the class described compris ing a carriage, a cross head swiveled thereon, u rightscarried by the head, a ring carried y the uprights, means for moving said ring vertically on; said uprights and means for rotatably clamping\the toolin said ring. I

on, upri hts carried by the cross head, traveling bloc s on said uprights, means for moving said blocks vertically, a ring swiveled on said blocks, a carrying member rotatably supported on said ring and tool clamping means carried by said member.

. 3. A hoist of the class described comprising a carriage, a cross head swiveled thereon, a air of tubular uprights carried by the cross ead and having slots therein, a screw shaft in each upright, means for rotating said screw shafts, a block on each upright and having a part engagin the screw shaft, a rlng pivoted to said b ocks, a carrying member having a circumferential groove in which the ring fits, and means for clamping the tool to said member.

4. A hoist of the class described comprising a carriage, a cross .head swiveled thereon, uprights carried by said cross head, screw shafts in said uprights, means for rotating said shafts, a traveling block on each upright having a portion engaging with said screw shafts, a slotted ring pivoted to said blocks, a carrying member having a central opening adapted to coincide with the slot in the rlng and having a circumferential groove for receiving the ring, lugs on said member, set screws carried by said lugs and a swiveled head carried by each screw for engaging the tool. In testimony whereof we aifix tures.

BENJAMIN EUGENE SOLOMON STAGE. a.

our signa- 

